OK, maybe no-one here is an OpenMP user? Well in case it helps anyone, here's a thread on the Core Audio mailing list which has some tentative answers to my issue: http://lists.apple.com/archives/coreaudio-api/2009/May/msg00035.html Dan 2009/4/29 Dan S <d.a.n.stowell+gcc@xxxxxxxxx>: > Hi - > > I'm adding libgomp parallellisation to an existing piece of software. > Mac 10.4.11 ppc, scons build using gcc 4.4.0 ("gcc44" from macports). > Build goes fine and the app runs normally. However it crashes when my > parallel code is called: > > (gdb) continue > [Switching to process 1297 thread 0x8703] > [Switching to process 1297 thread 0x8703] > Program received signal: "EXC_BAD_ACCESS". > (gdb) bt > #0 gomp_resolve_num_threads (specified=0, count=0) at > ../../../gcc-4.4.0/libgomp/libgomp.h:380 > #1 0x0047fb34 in GOMP_parallel_start (fn=0x219c34 > <Group_Calc_parallel.omp_fn.0>, data=0xf070d6bc, num_threads=104) at > ../../../gcc-4.4.0/libgomp/parallel.c:107 > #2 0x002180fc in Group_Calc_parallel (inGroup=0x3264100) at > Source/server/SC_Group.cpp:105 > > Here's the offending code: > > void Group_Calc_parallel(Group *inGroup) > { > Node *firstChild = inGroup->mHead; > Node *aChild = firstChild; > int numChildren = 0; > > while (aChild) { > ++numChildren; > aChild = aChild->mNext; > } > > if(numChildren != 0){ > #pragma omp parallel for > for (int i=0; i < numChildren; ++i) { > Node *llChild = firstChild; > for(int j=0; j<i; ++j) > llChild = llChild->mNext; > (*llChild->mCalcFunc)(llChild); > } // end of parallellable "for" loop > } > } > > > GCC versions in use: > $ gcc-mp-4.4 --version > gcc-mp-4.4 (GCC) 4.4.0 > $ g++-mp-4.4 --version > g++-mp-4.4 (GCC) 4.4.0 > > > Any suggestions on what I can do to diagnose/fix this? > > Thanks > Dan > -- > http://www.mcld.co.uk > -- http://www.mcld.co.uk
